We're dividing 645356 by 51 
We want to figure out the number of times 645356 can be divided by 51.

Moving on to step 1:
If we divide 6 by 51, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 51

Let's proceed to step 2:
64 divided by 51 is 1 with a remainder of 13.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 51 from 64, we get 13.
Grab the next digit (5) from the dividend, add it to 13, then carry on: 135 / 51

Advancing to step 3:
51 can be fit into 135 2 times, resulting in a remainder of 33.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Deduct 102 from 135 and we're left with 33.
Append the next digit (3) from the dividend to 33 and continue with: 333 / 51

Advancing to step 4:
333 divided by 51 is 6 with a remainder of 27.
The next digit of our result is 6. 
Result so far: 126.0
If we take 306 away from 333, we end up with 27.
Take the next digit (5) from the dividend and append it to 27, then repeat: 275 / 51

Step 5:
51 goes into 275 5 times with a remainder of 20.
The next digit of our result is 5. 
Result so far: 1265.0
Subtracting 255 from 275 leaves us with 20.
Append the next digit (6) from the dividend to 20 and continue with: 206 / 51

Step 6:
51 can be fit into 206 4 times, resulting in a remainder of 2.
The next digit of our result is 4. 
Result so far: 12654.0
If we take 204 away from 206, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 7:
20 divided by 51 is 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 12654.0
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 8:
The number 51 fits into 200 3 times, leaving a remainder of 47.
Record the quotient 3 as the next digit in the result. 
Result so far: 12654.03
Subtract 153 from 200 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Step 9:
470 divided by 51 is 9 with a remainder of 11.
The next digit of our result is 9. 
Result so far: 12654.039
Deduct 459 from 470 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 10:
110 divided by 51 is 2 with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 12654.0392
Subtracting 102 from 110 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 11:
51 can be fit into 80 1 times, resulting in a remainder of 29.
The number 1 becomes the next digit in our result. 
Result so far: 12654.03921
The remainder is 29 after subtracting 51 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Let's proceed to step 12:
If we divide 290 by 51, we get 5 and a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 12654.039215
If we subtract 255 from 290, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 13:
When dividing 350 by 51, we get 6 with a remainder of 44.
The number 6 becomes the next digit in our result. 
Result so far: 12654.0392156
Deduct 306 from 350 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 14:
51 goes into 440 8 times with a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 12654.03921568
If we subtract 408 from 440, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

After the division, we end up with 12654.03921568 and a remainder of 3.2e-08.